Pub Date : 2018-01-01DOI: 10.7494/mafe.2018.44.4.161
T. Bajor, A. Kawałek, S. Sawicki, K. Laber, J. Borowski
Knowledge of the characteristics describing the technological properties of the material is the basis for correct numerical simulation and the design of new technological processes or the modernization of existing ones. For each technological process of plastic forming, a set of features should be defined that correctly describe the susceptibility of the material to its shaping in a given process. The paper presents the results of rheological tests of 6xxx series Al alloy, obtained for deformation parameters corresponding to the process of the extrusion of large-size profiles. The effect of deformation conditions on changes in yield stress was determined. Next, the true values of the mathematical model coefficients describing the rheological properties of the tested material were determined using the inverse method, which is the basis for conducting numerical tests.
{"title":"INFLUENCE OF DEFORMATION CONDITIONS ON THE RHEOLOGICAL PROPERTIES OF 6xxx SERIES Al ALLOY","authors":"T. Bajor, A. Kawałek, S. Sawicki, K. Laber, J. Borowski","doi":"10.7494/mafe.2018.44.4.161","DOIUrl":"https://doi.org/10.7494/mafe.2018.44.4.161","url":null,"abstract":"Knowledge of the characteristics describing the technological properties of the material is the basis for correct numerical simulation and the design of new technological processes or the modernization of existing ones. For each technological process of plastic forming, a set of features should be defined that correctly describe the susceptibility of the material to its shaping in a given process. The paper presents the results of rheological tests of 6xxx series Al alloy, obtained for deformation parameters corresponding to the process of the extrusion of large-size profiles. The effect of deformation conditions on changes in yield stress was determined. Next, the true values of the mathematical model coefficients describing the rheological properties of the tested material were determined using the inverse method, which is the basis for conducting numerical tests.","PeriodicalId":18751,"journal":{"name":"Metallurgy and Foundry Engineering","volume":"9 1","pages":"161"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84238089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-01-01DOI: 10.7494/MAFE.2018.44.2.81
E. Rudnik
The electrodeposition of silver from AgNO 3 solutions with the addition of L-tartaric acid was investigated. The cathodic reaction was accompanied by low electrode polarization and run under activation control for AgNO 3 concentrations of above 70 mM. Tartaric acid only slightly shifted the polarization curves towards more electronegative potentials (by approx. 50 mV), but it did not change the rate-determining step. The activation control of the process resulted in the formation of rough and coherent deposits, while the mixed or diffusion control of the process promoted the formation of dendritic-like structures and spongy deposits.
{"title":"ELECTRODEPOSITION OF SILVER FROM NITRATE-TARTRATE SOLUTIONS","authors":"E. Rudnik","doi":"10.7494/MAFE.2018.44.2.81","DOIUrl":"https://doi.org/10.7494/MAFE.2018.44.2.81","url":null,"abstract":"The electrodeposition of silver from AgNO 3 solutions with the addition of L-tartaric acid was investigated. The cathodic reaction was accompanied by low electrode polarization and run under activation control for AgNO 3 concentrations of above 70 mM. Tartaric acid only slightly shifted the polarization curves towards more electronegative potentials (by approx. 50 mV), but it did not change the rate-determining step. The activation control of the process resulted in the formation of rough and coherent deposits, while the mixed or diffusion control of the process promoted the formation of dendritic-like structures and spongy deposits.","PeriodicalId":18751,"journal":{"name":"Metallurgy and Foundry Engineering","volume":"37 1","pages":"81"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78051155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-01-01DOI: 10.7494/mafe.2018.44.2.91
B. Sułkowski
The effect of the initial texture on the deformation mode and mechanical properties was studied in magnesium and its AZ61 alloy. Both materials had a very similar initial texture. Two cases were investigated: samples with a texture where the basal slip system was blocked, and samples having a texture where the basal slip system was allowed to activate. The samples were deformed by compression at room temperature at a strain rate of 10 -3 s -1 . It was found that the initial texture had a very strong impact on the deformation mode in magnesium; however, there was no effect of the initial texture on the deformation mode in the case of AZ61. The investigations were compared to simulations of texture evolution using the Taylor model. From the simulations, the Taylor factor and slip system activity were obtained. It was found that, in the case of magnesium, twinning or slip (both basal and non-basal) are the two main deformation modes, while in the case of AZ61, slip is the only main deformation mechanism despite the initial texture. The impact of the initial texture is discussed in more detail in the present study.
研究了镁及其AZ61合金初始织构对合金变形方式和力学性能的影响。两种材料的初始纹理非常相似。研究了两种情况:具有基底滑动系统被阻塞的纹理的样品，以及具有允许基底滑动系统激活的纹理的样品。试样在室温下以10 -3 s -1的应变速率进行压缩变形。结果表明，初始织构对镁合金的变形模式有很强的影响;而初始织构对AZ61的变形模式没有影响。将研究结果与使用Taylor模型的纹理演化模拟进行了比较。通过模拟得到了滑动系统的泰勒因子和活动性。结果表明，在镁合金中，孪晶或滑移(基底和非基底)是两种主要变形模式，而在AZ61中，滑移是唯一的主要变形机制，尽管存在初始织构。本文详细讨论了初始织构的影响。
{"title":"Effect of texture on deformation mode in magnesium and AZ61 alloy","authors":"B. Sułkowski","doi":"10.7494/mafe.2018.44.2.91","DOIUrl":"https://doi.org/10.7494/mafe.2018.44.2.91","url":null,"abstract":"The effect of the initial texture on the deformation mode and mechanical properties was studied in magnesium and its AZ61 alloy. Both materials had a very similar initial texture. Two cases were investigated: samples with a texture where the basal slip system was blocked, and samples having a texture where the basal slip system was allowed to activate. The samples were deformed by compression at room temperature at a strain rate of 10 -3 s -1 . It was found that the initial texture had a very strong impact on the deformation mode in magnesium; however, there was no effect of the initial texture on the deformation mode in the case of AZ61. The investigations were compared to simulations of texture evolution using the Taylor model. From the simulations, the Taylor factor and slip system activity were obtained. It was found that, in the case of magnesium, twinning or slip (both basal and non-basal) are the two main deformation modes, while in the case of AZ61, slip is the only main deformation mechanism despite the initial texture. The impact of the initial texture is discussed in more detail in the present study.","PeriodicalId":18751,"journal":{"name":"Metallurgy and Foundry Engineering","volume":"24 1","pages":"91"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78628278","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-01-01DOI: 10.7494/mafe.2018.44.4.169
I. Dobosz, W. Gumowska, M. Czapkiewicz
The iron nanowire arrays (NWs) were fabricated by DC electrodeposition into hexagonally ordered alumina pores. With the use of X-ray diffraction analysis, the structure of iron wires was determined. The iron wires have the Body Centered Cubic structure. The influence of cathodic deposition potential and parameters of membrane on the magnetic properties of nanowire arrays was investigated. Magnetic properties analyzed by VSM measurements suggest that the easy axis of magnetization follows the nanowire axis, with coercivity increasing with a decrease of nanowire diameter and length. The dependence of the height of Fe wires on the electrodeposition potential was determined. The low cathodic potential and smaller pore diameter are the synthesis parameters most beneficial for large coercivity with easy axis along nanowires.
{"title":"MAGNETIC PROPERTIES OF Fe NANOWIRES ELECTRODEPOSITED IN SELF-ORDERED ALUMINA MEMBRANE","authors":"I. Dobosz, W. Gumowska, M. Czapkiewicz","doi":"10.7494/mafe.2018.44.4.169","DOIUrl":"https://doi.org/10.7494/mafe.2018.44.4.169","url":null,"abstract":"The iron nanowire arrays (NWs) were fabricated by DC electrodeposition into hexagonally ordered alumina pores. With the use of X-ray diffraction analysis, the structure of iron wires was determined. The iron wires have the Body Centered Cubic structure. The influence of cathodic deposition potential and parameters of membrane on the magnetic properties of nanowire arrays was investigated. Magnetic properties analyzed by VSM measurements suggest that the easy axis of magnetization follows the nanowire axis, with coercivity increasing with a decrease of nanowire diameter and length. The dependence of the height of Fe wires on the electrodeposition potential was determined. The low cathodic potential and smaller pore diameter are the synthesis parameters most beneficial for large coercivity with easy axis along nanowires.","PeriodicalId":18751,"journal":{"name":"Metallurgy and Foundry Engineering","volume":"19 1","pages":"169"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86006387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-01-01DOI: 10.7494/mafe.2018.44.3.119
R. Romankiewicz, F. Romankiewicz
The research on the dispersal of slag from the slurry process was carried out in a laboratory resistance furnace. Before declaring, the slag contained 13.62% copper. In the processes of reduction of slag samples with calcium carbide in the form of carbide with activating additives Na2CO3 and CaF2, the content of copper in the slag was reduced to a level of 0.28–0.63% Cu. The polymetallic melt formed after the decoupling of the slag contained 78.55–84.9% Cu, 10.8–16.48% Pb, and 0.08–0.39% Fe.
{"title":"RESEARCH ON COPPER RECOVERY FROM SLEDGE FROM SUSPENDED COPPER CONCENTRATE REDUCTION PROCESS","authors":"R. Romankiewicz, F. Romankiewicz","doi":"10.7494/mafe.2018.44.3.119","DOIUrl":"https://doi.org/10.7494/mafe.2018.44.3.119","url":null,"abstract":"The research on the dispersal of slag from the slurry process was carried out in a laboratory resistance furnace. Before declaring, the slag contained 13.62% copper. In the processes of reduction of slag samples with calcium carbide in the form of carbide with activating additives Na2CO3 and CaF2, the content of copper in the slag was reduced to a level of 0.28–0.63% Cu. The polymetallic melt formed after the decoupling of the slag contained 78.55–84.9% Cu, 10.8–16.48% Pb, and 0.08–0.39% Fe.","PeriodicalId":18751,"journal":{"name":"Metallurgy and Foundry Engineering","volume":"75 2-3 1","pages":"119"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78139500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-01-01DOI: 10.7494/mafe.2018.44.4.195
Magdalena Majchrowska, Konrad Lasek, M. Nowak, P. Pałka, B. Sułkowski
The Al/Fe material was prepared by the powder metallurgy route with an additional intermediate stage which was a centrifuge of powder mixture. The application of the centrifuge stage was applied to obtain circular phase distribution of Al-rich phases in a sintered material. Iron powder with a particle size under 100 μm and aluminum powder with a particle size of about 25 μm, were used as starting materials. To determine the effect of centrifuging time on the distribution of Fe-Al particles, scanning electron microscopy (SEM, EDS) and XRD techniques were used. Microstructure observations show the influence of the centrifuging time on the distribution of Fe particles. It was observed that a longer centrifuging time caused changes in the ratio concentration of elements and allowed the growth of the intermetallic phase at the interface between solid Al and Fe particles.
{"title":"CHARACTERISTICS OF Al-Fe SINTERS MADE BY THE POWDER METALLURGY ROUTE","authors":"Magdalena Majchrowska, Konrad Lasek, M. Nowak, P. Pałka, B. Sułkowski","doi":"10.7494/mafe.2018.44.4.195","DOIUrl":"https://doi.org/10.7494/mafe.2018.44.4.195","url":null,"abstract":"The Al/Fe material was prepared by the powder metallurgy route with an additional intermediate stage which was a centrifuge of powder mixture. The application of the centrifuge stage was applied to obtain circular phase distribution of Al-rich phases in a sintered material. Iron powder with a particle size under 100 μm and aluminum powder with a particle size of about 25 μm, were used as starting materials. To determine the effect of centrifuging time on the distribution of Fe-Al particles, scanning electron microscopy (SEM, EDS) and XRD techniques were used. Microstructure observations show the influence of the centrifuging time on the distribution of Fe particles. It was observed that a longer centrifuging time caused changes in the ratio concentration of elements and allowed the growth of the intermetallic phase at the interface between solid Al and Fe particles.","PeriodicalId":18751,"journal":{"name":"Metallurgy and Foundry Engineering","volume":"23 1","pages":"195"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76006245","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-01-01DOI: 10.7494/mafe.2018.44.3.133
S. Berski, M. Krakowiak, T. Bajor, A. Kawałek, H. Jurczak
Changing market preferences regarding expectations in terms of the functionality, properties, and appearance of a finished product place excessive demands on manufacturers. The 6xxx-series alloys are the most commonly used in extrusion, and they have broad applications (e.g., the construction, electronics, automotive, and shipbuilding industries). The development of deformation technology at the design stage reaps unquestionable benefits when planning the production process. Under real conditions, the extrusion of hollow profiles requires the use of pocket dies, whose proper design is a complex process. This paper presents the results of preliminary numerical investigations of the extrusion process of structural panels from the 6005A aluminum alloy intended for the construction of transport car bodies. The influence of selected parameters of the extrusion process on the temperature distribution was analyzed in the material. The calculations were made using FEM for a three-dimensional deformation state, taking into account the thermal phenomena occurring during the applied deformation scheme in the extrusion process carried out in a flat die.
{"title":"ANALYSIS OF INFLUENCE OF PROCESS PARAMETERS ON TEMPERATURE DISTRIBUTION IN PROFILES EXTRUDED FROM 6xxx-SERIES ALUMINUM ALLOYS","authors":"S. Berski, M. Krakowiak, T. Bajor, A. Kawałek, H. Jurczak","doi":"10.7494/mafe.2018.44.3.133","DOIUrl":"https://doi.org/10.7494/mafe.2018.44.3.133","url":null,"abstract":"Changing market preferences regarding expectations in terms of the functionality, properties, and appearance of a finished product place excessive demands on manufacturers. The 6xxx-series alloys are the most commonly used in extrusion, and they have broad applications (e.g., the construction, electronics, automotive, and shipbuilding industries). The development of deformation technology at the design stage reaps unquestionable benefits when planning the production process. Under real conditions, the extrusion of hollow profiles requires the use of pocket dies, whose proper design is a complex process. This paper presents the results of preliminary numerical investigations of the extrusion process of structural panels from the 6005A aluminum alloy intended for the construction of transport car bodies. The influence of selected parameters of the extrusion process on the temperature distribution was analyzed in the material. The calculations were made using FEM for a three-dimensional deformation state, taking into account the thermal phenomena occurring during the applied deformation scheme in the extrusion process carried out in a flat die.","PeriodicalId":18751,"journal":{"name":"Metallurgy and Foundry Engineering","volume":"65 1","pages":"133"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75369465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-10-13DOI: 10.7494/MAFE.2017.43.2.81
M. Bartosiewicz, A. Cwudziński
This article presents the results of computer simulation of the flow of liquid steel through one-strand tundish. In paper was examined four immersion depth of ladle shroud in liquid steel. The simulation was performed for sequence of slabs casting. The effect of calculations were a residence time distribution curves (RTD), type (F). Based on the distribution curves range of the transition zone for the different variants of the immersion depth of ladle shroud were estimated. Based on the results of numerical calculations, it was found that increase the immersion depth of ladle shroud in liquid steel influences on the range of transition zone. For numerical simulation of the flow of liquid steel Ansys-Fluent program were used.
{"title":"INFLUENCE OF IMMERSION DEPTH OF LADLE SHROUD IN LIQUID STEEL ON RANGE OF THE TRANSITION ZONE FOR ONE-STRAND TUNDISH DURING CONTINUOUS CASTING OF STEEL","authors":"M. Bartosiewicz, A. Cwudziński","doi":"10.7494/MAFE.2017.43.2.81","DOIUrl":"https://doi.org/10.7494/MAFE.2017.43.2.81","url":null,"abstract":"This article presents the results of computer simulation of the flow of liquid steel through one-strand tundish. In paper was examined four immersion depth of ladle shroud in liquid steel. The simulation was performed for sequence of slabs casting. The effect of calculations were a residence time distribution curves (RTD), type (F). Based on the distribution curves range of the transition zone for the different variants of the immersion depth of ladle shroud were estimated. Based on the results of numerical calculations, it was found that increase the immersion depth of ladle shroud in liquid steel influences on the range of transition zone. For numerical simulation of the flow of liquid steel Ansys-Fluent program were used.","PeriodicalId":18751,"journal":{"name":"Metallurgy and Foundry Engineering","volume":"50 1","pages":"81"},"PeriodicalIF":0.0,"publicationDate":"2017-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77124961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-10-13DOI: 10.7494/MAFE.2017.43.2.89
A. Kasikov, Juri Neradovsky, M. Huber, Y. Mayorova, E. Rakitina, Nikolai V. Grishin
The problem of the disposal of metallurgical slags in the copper-nickel industry also remains open in the Kola Peninsula area, where this kind of exploitation and processing of sulphide Cu-Ni deposits is conducted. The urgent need is to reuse the waste slag heaps through the effective manner of their use based on our available technologies. The slag obtained after processing sulphide copper-nickel ores in the Kola Peninsula contains about 4 wt.% of the ore. The chemical and mineral composition of the slag plays a key role when considering the possibility of its re-use in the context of environmental nuisance. The line of processing Cu-Ni sulfide deposits from the slag proposed by the authors is based on the ability to change the slag phase composition by its oxidation and reduction processes for the enrichment of ore mineralization for reuse.
{"title":"HETEROGENEITY OF GLASS COMPONENTS IN SLAG AFTER NICKEL ACQUISITION PROCESS FROM KOLA PENINSULA (RUSSIA)","authors":"A. Kasikov, Juri Neradovsky, M. Huber, Y. Mayorova, E. Rakitina, Nikolai V. Grishin","doi":"10.7494/MAFE.2017.43.2.89","DOIUrl":"https://doi.org/10.7494/MAFE.2017.43.2.89","url":null,"abstract":"The problem of the disposal of metallurgical slags in the copper-nickel industry also remains open in the Kola Peninsula area, where this kind of exploitation and processing of sulphide Cu-Ni deposits is conducted. The urgent need is to reuse the waste slag heaps through the effective manner of their use based on our available technologies. The slag obtained after processing sulphide copper-nickel ores in the Kola Peninsula contains about 4 wt.% of the ore. The chemical and mineral composition of the slag plays a key role when considering the possibility of its re-use in the context of environmental nuisance. The line of processing Cu-Ni sulfide deposits from the slag proposed by the authors is based on the ability to change the slag phase composition by its oxidation and reduction processes for the enrichment of ore mineralization for reuse.","PeriodicalId":18751,"journal":{"name":"Metallurgy and Foundry Engineering","volume":"29 1","pages":"89"},"PeriodicalIF":0.0,"publicationDate":"2017-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87287884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-10-13DOI: 10.7494/MAFE.2017.43.2.97
Aleksandra Franczak, J. Karwan-Baczewska, D.Sc. Ph.D. Eng
Copper matrix composites containing ceramic particles such as carbides, borides, or nitrides have attracted much attention over the last few years. The increased interest in such materials has mainly been created by their high electrical and thermal conductivity, good mechanical and tribological properties, and microstructural stability. Among other nitrides, the titanium nitride seems to be considered asan attractive reinforcement due to its high hardness, excellent electrical conductivity, and stability at high temperatures. Moreover, its good corrosion resistance proves the uniqueness of the TiN particles above any other nitrides. In this work, Cu-10 wt.% TiN composite powders were produced by mechanical alloying and sintered by the spark plasma sintering (SPS) technique under different temperatures. The morphology and powder particle size after mechanical synthesis were inspected by a scanning electron microscopy (SEM) for all of the powder samples; chemical composition analyses (EDS) were also performed. The hydrostatic method was used to measure the density of the composite samples to analyze the influence of milling time on the process of consolidation in the composite powders.
{"title":"COPPER MATRIX COMPOSITES REINFORCED WITH TITANIUM NITRIDE PARTICLES SYNTHESIZED BY MECHANICAL ALLOYING AND SPARK PLASMA SINTERING","authors":"Aleksandra Franczak, J. Karwan-Baczewska, D.Sc. Ph.D. Eng","doi":"10.7494/MAFE.2017.43.2.97","DOIUrl":"https://doi.org/10.7494/MAFE.2017.43.2.97","url":null,"abstract":"Copper matrix composites containing ceramic particles such as carbides, borides, or nitrides have attracted much attention over the last few years. The increased interest in such materials has mainly been created by their high electrical and thermal conductivity, good mechanical and tribological properties, and microstructural stability. Among other nitrides, the titanium nitride seems to be considered asan attractive reinforcement due to its high hardness, excellent electrical conductivity, and stability at high temperatures. Moreover, its good corrosion resistance proves the uniqueness of the TiN particles above any other nitrides. In this work, Cu-10 wt.% TiN composite powders were produced by mechanical alloying and sintered by the spark plasma sintering (SPS) technique under different temperatures. The morphology and powder particle size after mechanical synthesis were inspected by a scanning electron microscopy (SEM) for all of the powder samples; chemical composition analyses (EDS) were also performed. The hydrostatic method was used to measure the density of the composite samples to analyze the influence of milling time on the process of consolidation in the composite powders.","PeriodicalId":18751,"journal":{"name":"Metallurgy and Foundry Engineering","volume":"47 1","pages":"97"},"PeriodicalIF":0.0,"publicationDate":"2017-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90952902","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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